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ClinicalTrials.gov public records Last synced Oct 8, 2026, 3:38 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 73–91 of 91 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Colecalciferol 2000 IU Clear all
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

LungVITamin D and OmegA-3 Trial (lungVITAL)

NCT01728571
View directory record Official record
Conditions
COPD, Asthma, Pulmonary Function, Pneumonia
Interventions
Vitamin D3, fish oil, Vitamin D3 placebo, Fish oil placebo
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Vitamin D3 Supplementation on Insulin Resistance and Cardiovascular Risk Factors in Obese Adolescents

NCT00858247
View directory record Official record
Conditions
Obesity
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 18 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 20, 2014 · Synced Oct 8, 2026, 3:38 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Vitamin D and Omega-3 Hypertension Trial (VITAL Hypertension)

NCT01653678
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D-3 (cholecalciferol), 2000 IU, Omega-3 fatty acids (fish oil), Vitamin D placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years to 99 Years
Enrollment
25,875 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Oct 8, 2026, 3:38 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers Results available

Age-related Macular Degeneration (AMD) in the Vitamin D and Omega-3 Trial (VITAL)

NCT01782352
View directory record Official record
Conditions
Age-related Macular Degeneration
Interventions
Omega-3 fatty acids (fish oil), Vitamin D3, Vitamin D3 placebo, Fish oil placebo
Drug · Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 8, 2023 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Phase 2 Interventional Results available

Development of Vitamin D as a Therapy for Breast Cancer - Phase 2

NCT00656019
View directory record Official record
Conditions
Breast Cancer
Interventions
Vitamin D
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 2, 2017 · Synced Oct 8, 2026, 3:38 PM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin D and Omega-3 Trial (VITAL)

NCT01169259
View directory record Official record
Conditions
Cancer, Cardiovascular Disease
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Vitamin D3 placebo, Fish oil placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
25,871 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 8, 2026, 3:38 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Omega-3 Adiposity Trial (VITAL Adiposity)

NCT01785004
View directory record Official record
Conditions
Adiposity
Interventions
Vitamin D3 (cholecalciferol), 2000 IU per day, omega-3 fatty acids (fish oil)
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 13, 2021 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional

Effect of Vitamin D Supplementation on Hemoglobin A1c in Patients With Uncontrolled Type 2 Diabetes Mellitus

NCT00985361
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Vitamin D3 2000 international units daily, Vitamin C 500mg daily
Dietary Supplement
Lead sponsor
ProMedica Health System
Other
Eligibility
21 Years to 75 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
3
States / cities
Sylvania, Ohio • Toledo, Ohio
Source: ClinicalTrials.gov public record
Updated May 6, 2010 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional Results available

Vitamin D Supplements for HIV-positive Patients on cART

NCT01295034
View directory record Official record
Conditions
HIV-associated Co-morbidities
Interventions
conventional vitamin D treatment, tiered/titrated vitamin D dosing
Dietary Supplement · Drug
Lead sponsor
Andrea Branch
Other
Eligibility
18 Years to 70 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

VITAL-DEP: Depression Endpoint Prevention in the VITamin D and OmegA-3 TriaL

NCT01696435
View directory record Official record
Conditions
Depression, Depressive Symptoms, Mood
Interventions
vitamin D3, omega-3 fatty acids (fish oil), Fish oil placebo, Vitamin D placebo
Dietary Supplement · Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
50 Years and older
Enrollment
18,353 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Oct 8, 2026, 3:38 PM EDT
Not listed Not applicable Interventional

The Effect of Vitamin D Repletion in Patients With Hepatocellular Carcinoma on the Orthotopic Liver Transplant List

NCT01575717
View directory record Official record
Conditions
Vitamin D Deficiency, Hepatocellular Carcinoma
Interventions
Vitamin D3 4000 IU, Vitamin D3 2000 IU
Drug
Lead sponsor
Andrea Branch
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 24, 2012 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Status Impacts Inflammation and Risk of Infections During Pregnancy

NCT01815047
View directory record Official record
Conditions
Inflammation, Infection
Interventions
Vitamin D3 Supplementation
Dietary Supplement
Lead sponsor
Cornell University
Other
Eligibility
13 Years to 18 Years · Female only
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2019
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2019 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional

Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D

NCT01877577
View directory record Official record
Conditions
Crohn's Disease (CD), Ulcerative Colitis (UC)
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jul 2, 2014 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Nutraceutical Effects on Long-Term Memory

NCT01963767
View directory record Official record
Conditions
Aging
Interventions
NT-020, Placebo
Drug · Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
65 Years to 85 Years
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 4, 2014 · Synced Oct 8, 2026, 3:38 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Independent and Combined Effects of Resistance Exercise Training and β-hydroxy β-methylbutyrate Plus Vitamin D

NCT03848741
View directory record Official record
Conditions
Aging, Skeletal Muscle
Interventions
Non-Exercise Control, Resistance Exercise Training, Placebo, HMB+VitD
Behavioral · Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Testosterone Pellets Plus Vitamin D and E Versus Vitamin D and E Alone for the Treatment of Peyronie's Disease

NCT01578473
View directory record Official record
Conditions
Peyronie's Disease
Interventions
Vitamin D2, Vitamin E, Testosterone Pellets
Drug
Lead sponsor
Men's Health Boston
Other
Eligibility
18 Years to 70 Years · Male only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Chestnut Hill, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D on Lipids

NCT00723385
View directory record Official record
Conditions
Hypercholesterolemia, Vitamin D Deficiency
Interventions
Vitamin D (1000 or 2000 IU/day), Placebo
Dietary Supplement · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2015 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Not applicable Interventional

DNA Changes That Affect Vitamin D Metabolism in Patients With Colorectal Cancer Receiving Vitamin D Supplements

NCT00550563
View directory record Official record
Conditions
Colorectal Cancer
Interventions
cholecalciferol, polymerase chain reaction, polymorphism analysis, protein expression analysis, reverse transcriptase-polymerase chain reaction, western blotting, high performance liquid chromatography, laboratory biomarker analysis, pharmacological study, adjuvant therapy, immunoscintigraphy
Dietary Supplement · Genetic · Other + 1 more
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 120 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Oct 8, 2026, 3:38 PM EDT
Completed Phase 4 Interventional

Supplementation in Adolescent Girls With Endometriosis

NCT02387931
View directory record Official record
Conditions
Endometriosis
Interventions
Vitamin D3, Fish Oil, Placebo
Dietary Supplement · Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
12 Years to 25 Years · Female only
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2016 · Synced Oct 8, 2026, 3:38 PM EDT